I have excluded a few Star Alliance airlines (Varig, SAS, BMI , Singapore etc) because AC already flies between YYZ and their main hub, which means, in competition terms, their presence in Toronto would not generate as much difference as non-Star members.

Just imagine, it's the middle of January, you step onboard our plane in YYZ, and you're suddenly transported to the land of sun, sand, and the mai-tai. Besides, I used to fly into YYZ a lot in my commuter days, and I'd like to go back now and then. Sweet dreams!

HAL

One smooth landing is skill. Two in a row is luck. Three in a row and someone is lying.